IMAGE Detailed Mission Requirements (DMR)

IMAGE 4000 -- Combined Ground System - Introduction

The IMAGE mission will be supported by the MIDEX SMOC. The SMOC will
minimize overall ground system life cycle costs using an architecture based
on commercially standard interfaces supporting a wide and diverse variety
of mission requirements, technology upgrades, and components of
opportunity. The SMOC architecture and implementation strategy is arranged
to promote rapid system development and test. The central concept is
functional consolidation plus the innovative use of proven systems and
technology. For development and operations continuity, the SMOC and the
SCT will support the IMAGE mission from Component Development through End
of Mission (EOM). The system will be designed and implemented to support a
"lights out" (unattended) mode of operation.

The MIDEX Combined Ground System features:

Use of standard interfaces and protocols.
The SMOC uses standard
NASA and commercial interfaces for
all ground support functions. For
example, data is exchanged between ground
system elements using Transmission Control Protocol/Internet Protocol
(TCP/IP) protocol thus enabling easy access by users and investigators.

Scalability. The SMOC can be applied to a diverse variety of requirements
ranging from elementary situations involving mission and science operations
control concentrated solely at the Principal
Investigator's site to more elaborate,
distributed systems involving
separate mission and science control
centers. Systems and functional
modules which have successfully
served earlier missions are scaled to
fit mission needs thereby simplifying
the development and test phases and providing more
initial reliability and minimizing technical risk over the long haul.

Concurrent Development and Test. The SMOC components are implemented and
tested concurrently by the same people who will operate the system. This
not only saves time but also progressively trains the operators.

Ability to readily incorporate technical upgrades.
"Plug and play" capabilities enable
introduction of new technology
without the need for extensive
retrofit of existing systems.

Use of the same system over the mission life cycle.
MIDEX Combined Ground System components begin their
life by serving as operational interfaces during
spacecraft component development, thus eliminating the need for temporary
artificial support. The same ground system then serves as the focal point
for larger scale ground system integration and test, and subsequent
operational employment until the end of the mission.

Ground Support Equipment Operating System (GSEOS): PC-based operating
system for managing IGSE.

The SMOC also contains equipment supporting science operations and
analysis.

Following spacecraft I&T at LMMS, the IMAGE spacecraft is shipped to WR
where final pre-launch testing is performed, as illustrated in Figure
4000-1.

Figure 4000-1: CGS Support for Pre-Launch Testing at Launch Site

After launch, the IMAGE spacecraft will be supported by the DSN during its
Deployment, IOC and nominal mission operations. Full operational support
of IMAGE by the SMOC through the DSN is shown in Figure 4000-2.

Figure 4000-2: CGS/DSN Mission Operation Support

IMAGE 4100 -- SMOC - Requirements

4100.1 The SMOC shall provide a physically secure SMOC facility
which provides external interfaces and data security for a scheduling
system, a command and control capability, a telemetry data processing
facility, a data management capability to support mission operations, and a
science operations capability.
Response: Requirement will be met

IMAGE 4116 -- Instrument Ground Support Equipment (IGSE) Interface

The SMOC will provide telemetry, command and time code interfaces to the
instrumenter- provided ground systems. These interfaces will allow the
instrumenter to receive and process real-time data in near-real-time in
order to check-out the instrument on-board the spacecraft. Additionally,
the SMOC will temporarily store playback data for subsequent access by the
instrumenter-provided ground systems.

If the IGSEs do not read the telemetry data within 10 minutes of receipt
from the Electrical Ground Support Equipment (EGSE) for any reason, the
FEDS will not guarantee near-real-time delivery of playback data. The
IGSEs must then disconnect from the real-time data stream and acquire the
playback data from the DHDS.

The SMOC will provide for the off-line exchange of telemetry data with the
instrumenter computer systems. No processing of the data is required other
than appending telemetry frame quality information to the data.

The ASIST workstation that is supplied to SwRI shall have the ability to
process and display telemetry data. The ASIST shall provide the capability
to construct real-time commands and send them to the FEDS to be routed, or
sent directly, to the SCU simulator. The format of the telemetry and
commands shall be based on the IMAGE IGSE/SGSE Interface Requirements
Control Document.

4116.1 The SMOC shall provide real-time and playback telemetry
packets locally to the Mission Analysis Room (MAR) for each of the
instrument ground systems, with up to 10 IGSEs.
4116.2 The maximum real-time delay to the IGSEs is specified in
the IMAGE IGSE/SGSE Interface Control Document.
4116.3 The SMOC shall provide a user telemetry interface to allow
users to request telemetry packets that are extracted from the playback
telemetry channel.
4116.4 The user telemetry interface shall allow the user to specify a list
of VC/APIDs and spacecraft time range of the packets.
4116.5 The data extraction and transmission of playback packets
shall not interfere with the transfer of real-time packets to another IGSE.
4116.6 The SMOC shall be capable of accepting command packets for
subsequent uplink from up to 10 users as specified in the IMAGE IGSE/SGSE
Interface Requirements Control Document.
4116.7 The SMOC shall display the NASA 36-bit time in the MAR for
instrument users.
Response: Requirements will be met

IMAGE 4118 -- Launch Segment Interface

4118.1 A FEDS will be placed at the data input/output of the S/C
for TLM/CMD I/F to the SMOC while IMAGE is on the pad or in the VAFB I&T
facility.
Response: Requirement will be met
4118.2 The DSN CTT will be provided at VAFB for Launch Site RF I/F
testing, with a hardline I/F to the SMOC.

IMAGE 4119 -- Time Code Interface

The SMOC and MAR will have the capability of receiving an external time
signal for time annotating events and data.

4119.1 The SMOC and MAR shall be capable of receiving, processing
and displaying NASA 36-bit time.
4119.2 The capability to correlate S/C time to ground time to
within 1 second shall be provided.
4119.3 The SMOC and MAR shall have the capability of displaying
two countdown/countup clocks triggered by the NASA 36-bit clock.
Response: Requirements will be met

IMAGE 4122 -- Report Requirements

The system shall provide at least one line printer and the capability to
print screen dumps.

4122.1 The SMOC shall provide at least one printer.
4122.2 The SMOC shall provide the capability to print screen dumps
of displays; log system events; print telemetry snapshots of any display
page whether or not the specified page is active; and generate plots of
operator-selected data versus time.
Response: Requirements will be met

IMAGE 4123 -- Display Requirements

The system shall have the ability to display telemetry, derived data points
and operator generated events as delineated in the following sections.

The system shall provide the capability to periodically display raw and
converted data on displays. The displays may be textual or contain
graphics.

4123.1 The user shall be able to select the update rate (maximum 1
Hz) of any display page.
4123.2 The system shall support the display of up to 500 telemetry
items at the maximum 1Hz refresh rate.
4123.3 The system shall provide the user with the capability to
print the contents of any load or dump image.
4123.4 The system shall provide display pages; printouts and log
files that log all ground system events; limit failures; flight events; and
all command mnemonics and bit patterns issued by the system
4123.5 The system shall provide page displays showing the contents
of on-board tables.
Response: Requirements will be met